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      常用VB操作ACCESS數(shù)據(jù)庫代碼

       悟靜 2009-07-26
      常用VB操作ACCESS數(shù)據(jù)庫代碼

      'VB引用項目如下:
      'Microsoft ADO Ext. 2.8 for DDL and Security
      'Microsoft ActiveX Data Objects 2.8 Library
      'COM+ Services Type Library
      'Microsoft DAO 3.6 Object Library
      Sub CreateDatabase(mdbPath, mdbPassword)

      Dim cat As New ADOX.Catalog
      If mdbPassword = "" Then
      cat.Create "Provider=Microsoft.Jet.OLEDB.4.0;Password=;Data Source" & mdbPath & ";"
      Else
      cat.Create "Provider=Microsoft.Jet.OLEDB.4.0;Password=" & mdbPassword & ";Data Source=" & mdbPath & ";"
      'cat.Create "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & mdbPath & ";"
      End If
      MsgBox "數(shù)據(jù)庫" & mdbPath & "建立成功", vbOKOnly
      'Set wspDefault = DBEngine.Workspaces(0)
      'Set dbs = wspDefault.CreateDatabase("Newdb.mdb", _
      'dbLangGeneral & ";pwd=NewPassword", dbEncrypt)

      End Sub

      Sub CreateTable(mdbPath, mdbTableName, mdbSqlColumns, mdbPrimaryKey)
      '建立列的sql語句
      'mdbPath="c:\test.mdb"
      'mdbTableName="User"
      'mdbSqlColumns="ID,adInteger;UserName,adVarWChar,20;Password,adVarWChar,20"
      'mdbPrimaryKey="ID"
      Dim tbl As New Table
      Dim cat As New ADOX.Catalog
      Dim con As ADODB.Connection
      cat.ActiveConnection = "Provider=Microsoft.Jet.OLEDB.4.0;Password=;Data Source=" & mdbPath & ";"


      Dim ArrayColumn As String
      tbl.Name = mdbTableName


      '添加數(shù)據(jù)表字段(字段格式:字段名 字段類別,字段長度;最末字段沒有分號)
          ArrayTotalColumn = Split(mdbSqlColumns, ";", -1, 1)
          For i = 0 To UBound(ArrayTotalColumn)
          ArraySingleColumn = Split(ArrayTotalColumn(i), ",", -1, 1)
          If UBound(ArraySingleColumn) = 1 Then
          'tbl.Columns.Append ArraySingleColumn(0), ArraySingleColumn(1)
          tbl.Columns.Append ArraySingleColumn(0), adInteger
          Else
          'tbl.Columns.Append ArraySingleColumn(0), ArraySingleColumn(1), ArraySingleColumn(2)
          tbl.Columns.Append ArraySingleColumn(0), adVarWChar, CInt(ArraySingleColumn(2))
          End If
          Next

      '設(shè)置數(shù)據(jù)表主鍵
      'tbl.Columns(mdbPrimaryKey).Properties("AutoIncrement") = True
      cat.Tables.Append tbl
       
      '設(shè)置列的必填屬性為“否”
      'tbl.Columns("Weight").Attributes = adColNullable
      '設(shè)置列的允許空字符串為“是”
      'tbl.Columns("FirstName").Properties("Jet OLEDB:Allow Zero Length") = True
          Set tbl = Nothing
          Set cat = Nothing
      MsgBox "數(shù)據(jù)表" & mdbPath & "-" & mdbTableName & "建立成功", vbOKOnly
      End Sub

      '這個準(zhǔn)備編寫成一個類。
      '其實作用跟我上次編寫的ASP操作ACCESS數(shù)據(jù)庫大全性質(zhì)和功能基本相似[Page]
      '數(shù)據(jù)庫--新建,刪除,壓縮,修復(fù),設(shè)置密碼,數(shù)據(jù)庫文件存在判斷,讀取'
      '數(shù)據(jù)表--新建,刪除,數(shù)據(jù)表名稱讀取,判斷,刪除,更新
      '數(shù)據(jù)字段--新建,修改,主鍵,允許為空,長度,外鍵,索引,字段名列表,判斷,屬性設(shè)置

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